US Bridges

U.S. 70 over Rock Creek

Fair

Bryan County, Oklahoma · 8.70 E Marshall C/L · Structure no. 104200000000000

Built
1946
79 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
8,700
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 70 over Rock Creek is a concrete culvert carrying U.S. 70 over Rock Creek in Bryan County, Oklahoma. It was built in 1946, so it is 79 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 8,700 vehicles a day, roughly 25% of them trucks, projected to reach 13,920 by 2042. The structure is 31 ft (9.5 m) long and 146 ft wide. If it were closed, the detour would be 39.1 mi (63 km).

Location

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CarriesU.S. 70
CrossesRock Creek
Location8.70 E Marshall C/L
RouteU.S. Route 70
CountyBryan County
StateOklahoma
Coordinates33.99815, -96.48292
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length31 ft (9.5 m)
Longest span12 ft (3.7 m)
Deck width146 ft (44.5 m)
Roadway width88 ft (26.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,700 (2022)
Projected traffic13,920 by 2042
Trucks25%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.1 mi (63 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$644,000
NavigationNo navigation control on waterway

Frequently asked questions

When was U.S. 70 over Rock Creek built?

It was built in 1946, making it 79 years old in 2025.

What condition is U.S. 70 over Rock Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does U.S. 70 over Rock Creek carry?

About 8,700 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is U.S. 70 over Rock Creek?

The structure is 31 ft (9.5 m) long with a longest span of 12 ft (3.7 m) and a deck 146 ft wide.

Who owns U.S. 70 over Rock Creek?

It is owned by the State Highway Agency.